Consulta: subjectFacets:"Small mammals"
Registros recuperados: 19
Data/hora: 06/06/2024 04:32:57

Habitat use and natural history of small mammals in the Central Paraguayan Chaco
Provedor de dados: 81
Autores: Yahnke,Christopher J.
I conducted a small mammal trapping study in the central Paraguayan Chaco region of South America to investigate habitat selection by small mammals at different spatial scales. Small mammals were collected in forest, successional thorn scrub, pasture, and crop fields representing both relatively undisturbed habitats and agroecosystems. A total of 1089 small mammals representing 13 species were captured during 23 296 trap nights. Pastures had the highest species richness as well as the highest number of captures. Some small mammal species such as Calomys laucha and Akodon toba were captured in a variety of habitats whereas others like Holochilus chacarius and Bolomys lasiurus were captured almost exclusively in pastures. Principal components analysis...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chaco; Habitat selection; Natural history; Paraguay; Small mammals.
Ano: 2006
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832006000100008

Dinâmica populacional de marsupiais e roedores no Parque Municipal da Lagoa do Peri, Ilha de Santa Catarina, sul do Brasil
Provedor de dados: 81
Autores: Graipel,Maurício E.; Cherem,Jorge J.; Monteiro-Filho,Emygdio L. A.; Glock,Luiz.
A two-year mark-recapture study of small mammals was conducted in an area of Atlantic Forest hillside in the state of Santa Catarina, Brazil. Four species of marsupial and seven species of rodent were captured during 12 132 trap-nights. Aspects of population dynamics and natural history are discussed for each common species. The sex ratio was biased toward males for all species. Oryzomys russatus, Didelphis aurita and Akodon montensis had the highest population densities, the least amount of variation in population density and an inverse relationship between survivorship rates and population densities. Micoureus paraguayanus, Nectomys squamipes and O. angouya, registered the higher population densities after continual survivorship rates. The recruitment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic Forest; Biology; Ecology; Reproduction; Small mammals.
Ano: 2006
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832006000100004

Small mammal selection and functional response in the diet of the maned wolf, Chrysocyon brachyurus (Mammalia: Canidae), in southeast Brazil
Provedor de dados: 81
Autores: Bueno,Adriana A.; Motta-Junior,José Carlos.
Data reported here are intended to describe patterns of predation by a solitary hunter, as well as to bring new insights into the predator-prey relationship in the Neotropical region. The goal of this study was to verify if there was small mammal selection in the diet of the maned wolf. Also, we attempt to test for a functional response in relation to the consumption of small mammals. The study was carried out in the Ecological Station of Itirapina (ESI), São Paulo, Brazil. Faeces collection and small mammal abundance survey by pitfall trapping were conducted simultaneously during 2000-2002. The maned wolf was selective in the consumption of small mammals. Calomys tener and Oligoryzomys nigripes (Muridae) were consumed less than expected by chance, whereas...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chrysocyon brachyurus; Prey selection; Prey switching; Small mammals.
Ano: 2006
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832006000100002

Human use and small mammal communities of Araucaria forests in Neuquén, Argentina
Provedor de dados: 81
Autores: Shepherd,John D.; Ditgen,Rebecca S.
Small mammals were sampled in five closed, humid, Araucaria araucana forests that differed in the degree of anthropogenic disturbance in southwestern Neuquén province. Nine species were captured in 3416 trap nights. Abrothrix longipilis and Oligoryzomys longicaudatus made up 88% of all captures. Small mammal relative abundance was 52 times higher where grazing was absent compared to a site with intense grazing pressure. Seed predation, primarily by livestock and feral exotic mammals, varied from 59.7% to 15.1% of marked seeds per day. Small mammal community productivity and composition were correlated with understory structure (Mantel test, r = 0.529, p = 0.04), and with rates of seed predation (r = -0.91, n = 4, p = 0.08). Forests with less complex...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Araucaria araucana; Exotic species; Human impact; Seed predation; Small mammals.
Ano: 2005
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832005000200008

Small mammals from the Early Miocene of Sabuncubeli (Manisa, S.W. Anatolia, Turkey)
Provedor de dados: 16
Autores: Bruijn, H. de; Mayda, S.; Hoek Ostende, L.W. van den; Kaya, T.; Saraç, G.
The assemblage of small mammals from Sabuncubeli is of special interest because: 1) it is the first from the Early Miocene of Anatolia that occurs associated with a set of large mammal remains, 2) it is only the second from Anatolia representing MN3, 3) it has a composition that is essentially different from the one from Keseköy, the other MN3 assemblage from Anatolia.  Some of the genera and species that are common in Keseköy are either very rare or absent in Sabuncubeli: i.e. the insectivores Galerix uenayae and Theratiskos and the rodents Debruijnia, Vallaris, Sayimys and Enginia. Others, such as Schizogalerix evae, Steneofiber eseri, Palaeosciurus fissurae and Eumyarion orhani occur in Sabuncubeli, but not in Keseköy. The new species Schizogalerix evae...
Tipo: Article / Letter to the editor
Palavras-chave: Early Miocene; Schizogalerix evae n. sp.; Eumyarion orhani n. sp.; Small mammals; Sabuncubeli; Anatolia; Turkey; 38.22; 42.84.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/327716

A long-term study of small mammal populations in a Quercus dentata forest surrounded by agricultural lands in Tokachi，Hokkaido : I．Yearly changes in fauna and populations
Provedor de dados: 19
Autores: Onoyama, Keiichi; 小野山, 敬一.
Palavras-chave: Small mammals; Clethrionomys rufocanus bedfordiae; Yearly chenge; Population; Reproduction.
Ano: 1988
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1544

Small mammals in a Coniferous Forest at High Altitudes of the Daisetsu Mountains，Hokkaido，with Special Reference to the Home Range and Microhabitat of Clethrionomys rutilus mikado
Provedor de dados: 19
Autores: Onoyama, Keiichi; 小野山, 敬一.
Palavras-chave: Small mammals; High altitude; Clethrionomys rutilus mikado; Home range; Vegetation.
Ano: 1989
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1559

Influence of pitfall trap size and design on herpetofauna and small mammal studies in a Neotropical Forest
Provedor de dados: 103
Autores: Ribeiro-Júnior,Marco A; Rossi,Rogério V; Miranda,Cleuton L; Ávila-Pires,Teresa C. S.
One of the most commonly used sampling techniques to capture leaf litter amphibians, lizards and small mammals is a set of pitfall traps with drift fences. However, there are still many speculations concerning the effectiveness of different designs of pitfall traps and the most adequate size of each trap. To address this problem, we conducted the first standardized comparison of patterns of species richness, rank-abundance, and community structure of leaf litter amphibians, lizards and small mammals for two trap designs (I and Y format) and three bucket sizes (35, 62, and 100 L) in a Neotropical forest. Results are very similar for the herpetofauna, regardless of the pitfall trap design or size used, while for small mammals values of species richness were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amphibians; Faunal survey; Neotropical forest; Reptiles; Sampling method; Small mammals.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000100012

Differential effects of habitat fragmentation on birds and mammals in Valdivian temperate rainforests
Provedor de dados: 97
Autores: KELT,DOUGLAS A.
Four recent studies on Chilean vertebrates underscore the very different effects that habitat fragmentation may have under different conditions. In southern Chile, birds exhibited significant species-area relationships, whereas the more depauperate small mammal community did not. The avifauna of highly isolated rainforest remnants in Fray Jorge National Park (IV Región) presented steeper species-area relations than those in southern Chile, reminiscent of land-bridge islands after faunal relaxation. The small mammal results were unexpected but may reflect the reduced vagility and immigration potential of this group. Additionally, the inter-remnant matrix habitat may support large populations of only some species, allowing them to capitalize on resources...
Tipo: Journal article
Palavras-chave: Habitat fragmentation; Valdivian temperate rainforest; Small mammals; Birds; Conservation.
Ano: 2001
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000400005

Long-term research in Bosque Fray Jorge National Park: Twenty years studying the role of biotic and abiotic factors in a Chilean semiarid scrubland
Provedor de dados: 97
Autores: GUTIÉRREZ,JULIO R; MESERVE,PETER L; KELT,DOUGLAS A; ENGILIS JR,ANDREW; PREVITALI,M. ANDREA; MILSTEAD,W. BRYAN; JAKSIC,FABIAN M.
Since 1989, we have conducted a large-scale ecological experiment in semiarid thorn scrub of a national park in north-central Chile. Initially, we focused on the role of biotic interactions including predation, interspecific competition, and herbivory in small mammal and plant components of the community. We utilized a reductionist approach with replicated 0.56 ha fenced grids that selectively excluded vertebrate predators and/or larger small mammal herbivores such as the degu, Octodon degus. Although we detected small transitory effects of predator exclusions on degu survival and numbers, other species failed to show responses. Similarly, interspecific competition (i.e., degus with other small mammals) had no detectable numerical effects (although some...
Tipo: Journal article
Palavras-chave: Birds; Chilean desert; Ephemeral plants; LTER; Small mammals.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2010000100005

The ecological value of long-term studies of birds and mammals in Central America, South America and Antarctica
Provedor de dados: 97
Autores: Taig-Johnston,Megan; Strom,Madeline K.; Calhoun,Kendall; Nowak,Kendra; Ebensperger,Luis A.; Hayes,Loren.
Abstract This review covers long-term ecological studies in Central America, South America, and Antarctica that include at least 10 years of data on both terrestrial and marine mammals as well as birds. Specifically, we compiled long-term research on social systems, population ecology, and community ecology. Long-term research is necessary to understand decadal trends and dynamics that would otherwise go unnoticed in short-term studies. This review highlights the impact of ecological conditions as well as territoriality and conflict on social organization and structure, the role that environmental perturbations and climate change have on populations, and how interaction between biotic and abiotic factors influence entire ecological communities. It...
Tipo: Journal article
Palavras-chave: Long-term studies; Social systems; Population ecology studies; Community ecology studies; ENSO; Small mammals.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2017000100501

A Preliminary Note on Yeasts Associated With Fecal Pellets of Rodents and Marsupials of Atlantic Forest Fragments in Rio de Janeiro, Brazil
Provedor de dados: 59
Autores: Abranches,Jacqueline; Nóbrega,Hilda N.; Valente,Patrícia; Mendonça-Hagler,Leda C.; Hagler,Allen N.
Yeasts had mean counts of above 106 CFU/g in the fecal pellets of small mammals from tropical forest fragments. Most of the 55 species isolated were fermentative ascomycetes, with the most frequent being Debaryomyces hansenii, Pichia membranifaciens and Issatchenkia orientalis, whereas Rhodotorula mucilaginosa was the most frequent yeast of basidiomycetous affinity.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Small mammals; Yeast diversity; Yeast vectors.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141998000300004

Land fauna composition of small mammals of a fragment of Atlantic Forest in the State of Sao Paulo, Brazil
Provedor de dados: 104
Autores: Barros-Battesti,Darci Moraes; Martins,Rosana; Bertim,Carlos Roberto; Yoshinari,Natalino Hajime; Bonoldi,Virginia L.N.; Leon,Elaine P.; Miretzki,Michel; Schumaker,Teresinha T.S.
The Atlantic Forest small mammal land fauna, except bats, and the abiotic factors that might have an influence on its composition, were studied in the Itapevi County, State of Sao Paulo, a forested region, partly altered by antropic action, from January, 1995 to June, 1996. The trapping effort consisted of 2,888 trap-nights, resulting in a 4.6% trapping success and consisted of monthly trappings, for five consecutive days. During this period, 134 specimens were captured, of which 46.3% were Didelphimorphia and 53.7% were Rodentia. Eleven species were registered: two Didelphimorphia: Didelphis marsupialis (Linnaeus, 1758) and Marmosops incanus (Lund, 1841), and nine Rodentia: Akodon cursor (Winge, 1887), Bolomys lasiurus (Lund, 1841), Oxymycterus hispidus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Small mammals; Marsupial; Rodent; Atlantic Forest.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000100021

A radio tracking study of home range and movements of the marsupial Micoureus demerarae (Thomas) (Mammalia, Didelphidae) in the Atlantic forest of south-eastern Brazil
Provedor de dados: 104
Autores: Moraes Junior,Edsel Amorim; Chiarello,Adriano Garcia.
From August 2001 to July 2002 the home range and movements of seven Micoureus demerarae (Thomas, 1905) (three males and four females) were investigated using radio tracking in the União Biological Reserve, state of Rio de Janeiro, south-eastern Brazil. A total of 436 locations was obtained and home range estimated with fixed Kernel (95% of data points), and minimum convex polygon (MCP) methods, with 100 and 95% of data points. Male home ranges estimated by MCP (100%) ranged from 5.4-24.2 ha and females from 0.3-10.7 ha. Corresponding figures calculated with Kernel (95%) were 4-10.9 ha for males and 1.3-5.9 ha for females. Animals travelled on average 423 m/night, with males travelling significantly further (582.8 m/night) than females (335.1 m/night) (t...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Kernel; Minimum convex polygon; Radio-telemetry; Small mammals; Travelling.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000100011

Nine-year demography of the black-eared opossum Didelphis aurita (Didelphimorphia: Didelphidae) using life tables
Provedor de dados: 104
Autores: Kajin,Maja; Cerqueira,Rui; Vieira,Marcus V.; Gentile,Rosana.
A population of the black-eared opossum, Didelphis aurita Wied-Neuwied 1826, was studied during 1997-2006 by capture-mark-recapture in the Atlantic Forest in the state of Rio de Janeiro. Cohorts were established with females marked still in the pouch, classified into five age classes. Population parameters were estimated using life tables. Survival was type III and mortality was greatest in age classes I and II, just after weaning. Fecundity was inversely correlated with survival, reproductive value was inversely correlated with mortality and residual reproductive value was inversely correlated with fecundity. The intrinsic rate of increase was always close to zero and tended to be slightly negative. The black-eared opossum can be considered a good model...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic forest; Cohort; Intrinsic factors; Small mammals; Survival.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000200007

Ongoing quiescence in the Borborema Plateau Plague focus (Paraiba, Brazil)
Provedor de dados: 42
Autores: ZEPPELINI,CAIO G.; DE ALMEIDA,ALZIRA M.P.; CORDEIRO-ESTRELA,PEDRO.
Abstract Plague is a zoonosis caused by Yersinia pestis, whose cycle is based on a reservoir system composed of mammals and their fleas. Its transmission cycle presents long enzootic periods with undetected cases, sometimes misleading that the cycle is extinct. While surveillance activities in Brazil are being carried out only in some focal areas, the serologic results confirm the persistence of Y. pestis in all monitored areas. We studied the small mammal assembly and Y. pestis presencein the Borborema Plateau Focus within the state of Paraíba, which staged the last Brazilian plague outbreak (1986-1987), through aninventory and Y. pestis detection survey of small mammals in peridomestic and sylvatic areas from two municipalities in the state of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Small mammals; Peridomestic environment; Yersinia pestis; Quiescence; Surveillance.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000603007

The small mammals of the highly impacted North-eastern Atlantic Forest of Brazil, Pernambuco Endemism Center
Provedor de dados: 49
Autores: Asfora,Paulo Henrique; Pontes,Antonio Rossano Mendes.
The Atlantic forest of Brazil is nowadays reduced to less than 8% of its total original area and yet many species remain to be described. The Atlantic Forest north to the São Francisco river - The Pernambuco Endemism Center (CEPE) - has less than 2% of its original forest cover and yet the knowledge on small mammals is scarce. Aiming to assess the small mammal community of this region surveys were carried out in 12 forest fragments of different sizes in distinct geographic areas of the CEPE. The capture-mark-recapture technique was used with live-traps set along linear transects. We recorded 15 species, two of which are in the IUCN Red List, but not in the Brazilian List of Threatened Species. The highest richness and abundance indices were recorded in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic forest; Forest fragments; Pernambuco Endemism Center; Small mammals.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000100004

Distribution of Oecomys catherinae Thomas, 1909 (Rodentia: Cricetidae) in northeastern Brazil with karyotypical and morphometrical notes
Provedor de dados: 49
Autores: Asfora,Paulo Henrique; Palma,Alexandre Ramlo Torre; Astúa,Diego; Geise,Lena.
The genus Oecomys Thomas, 1906 is currently composed of 16 species with unclear taxonomy and poorly known geographic limits. O. catherinae Thomas, 1909 is known to occur within the Brazilian Atlantic Forest from the states of Santa Catarina to Pernambuco (where the northernmost previously known specimen of Oecomys in the Atlantic forest was recorded), and along riverine forest into the Cerrado. To gain a greater understanding of its geographical and ecological distribution (mainly in Northeastern Brazil) and of its taxonomic characterization, we provide a short review of karyotypical and morphometrical data from specimens collected within the distribution range of the species. Specimens presented 2n = 60 and AN varying between 62 and 64. A table with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Small mammals; New register; Sigmodontinae; Cytogenetic; Morphometrics.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000200039

A new study method of microhabitat structure of small mammals
Provedor de dados: 57
Autores: CERQUEIRA,R.; FREITAS,S. R.
The variables in habitat studies are usually transformed in such a way that they become abstractions and intuition is lost. We tested a new method for the analysis of habitat using data collected in a grid laid at the "restinga de Maricá", in Rio de Janeiro State, Brazil. Thirty-seven microhabitat variables were measured at each trap station. We assume that these variables characterize the microhabitat structure at the moment when measurements were taken. The data are transformed in 3 ways: (1) the averages of the measured variables were calculated, as usual in habitat studies; (2) the data are transformed in densities per area in square meters without reduction in the number of variables; and (3) we calculated the natural logarithms of the data thus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Discriminant analysis; Methods; Niche; Neotropics; Small mammals.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000200006